2019年mpacc考试英语真题——其他310

{01}If you want your students to learn English well, you must ________ them to open their mouths.
A.make
B.let
C.encourage
D.improve
解析：
本题选C。
{02}The car ran fast. You must ________ the engine to catch up with it.
A.speed up
B.keep up
C.go up
D.hold up
解析：
本题选A。